Why is the closing scene of the novel important? How does it conclude the novel or what message does it leave us with?

In the final
scene of the Scarlet Letter, we see the shared tombstone ofand . They lie
in repose near each other.

Hester Pryne returned to the Puritanical life
even after she had been given the means to return to England where she lived for some time. But
the scarlet A had...